What are the symptoms of glaucoma

Everyone needs to pay attention to the symptoms of glaucoma, because only after seeing these symptoms can we discover them in time and take timely treatment measures, such as narrowing of vision, weakened vision, high intraocular pressure, and even nausea and vomiting.

1. Narrowing of the visual field and decreased vision: Due to high intraocular pressure, the optic nerve is damaged. In the early stages of glaucoma, vision loss and foggy vision often occur at night and disappear in the morning of the next day.

2. Nausea and vomiting: Increased intraocular pressure can also reflexively cause excitement of the vagus nerve and vomiting nerve center, resulting in severe nausea and vomiting.

3. Early symptoms of glaucoma: increased intraocular pressure: measured by a Scheherazade tonometer, the normal intraocular pressure range is 10-21 mmHg, and the eyeball is elastic when touched with a finger. When the intraocular pressure rises to 25-40 mmHg, touching the eyeball with a finger feels like an inflated ball and is relatively hard. When it rises to 40-70 mmHg, the eyeball will feel as hard as stone when pressed with your fingers.

4. Headache and eye swelling: Due to the sharp increase in intraocular pressure, the endings of the trigeminal nerve are stimulated, which reflexively causes pain in the trigeminal nerve distribution area. Glaucoma patients often feel migraine and eye swelling.

5. Iris vision: Due to increased intraocular pressure and impaired fluid circulation in the eye, corneal edema and refraction changes occur. At this time, when looking at sunlight, especially light, a colorful ring with an orange-red outer circle, a purple-blue inner circle, and a green center will appear. When the intraocular pressure returns to normal, the colored ring disappears. This phenomenon is called rainbow vision in medicine. If the halo vision is physiological or cataractous, there will be no symptoms of headache or increased intraocular pressure.